Once you have computed the double FFT as explained in the FAQ “How can I compute the double FFT in the vibro acoustic context in Flux?”, you have to create a 3D curve as follows:
| 1 | Click on 3D curve -> New
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| 2 | Select the type “Force as function of frequency and space mode”
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| 3 | Select the previously create force curve
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| 4 | Select “yes” for limiting the size of the tables
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Once the 3D curve has been created, you can extract the harmonic amplitude value by using the command:
ForcesCurve3D['name'].z[0].values[0]
And in order to put this value into I/O parameter, you have to use the command: VariationParameter['test'].formula=str(ForcesCurve3D['name'].z[0].values[0])
